- Clean up --dry-run values in tests, docs, and scripts
- Fix --dry-run for auth reconcile and add a test
Kubernetes-commit: d97169f59ad11f2d2ffd8ef14446bbec5ffc881b
Documentation is added in several areas:
1. `kubectl plugin` now prints a note that plugins are best discovered
with krew.dev and how to install it.
2. The kubectl book now has a new section about plugins, featuring
- a very brief introduction to the kubectl plugin mechanism
- a section about krew
Kubernetes-commit: ed0e0350854e34bad65de4db44c0f661a5851870